Video on these cases and how to print and install them can be found here:

This is a design for a screwless TPU case for the GoPro 6/7 and the 8. This can be printed as one piece with tree supports for easy removal. The GoPro TPU can be stretched to allow the GoPro internals to go inside.

This is just the case with no mount. Source files have been provided for you to easily add any mount that you wish. If you make one, please provide pictures/comments and either publish with the mount or let me know and I'll add it here.

The lens caps is to go over the entire mount, which are press fit to add protection for transportation.

Cases with mounts for the 3.5" Scythe can be found here: https://www.printables.com/model/473609-recursion-scythe-and-reaver